Apparatus

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sensors Mode-S transponder

4B1920

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JNK · BOEING 777-300ER

Hex
4B1920
Octal
22614440
Decimal
4,921,632
Country
CH
Tail
HB-JNK
Type
B77W
Transponder active on ground
Flights observed
104
Distinct callsigns
18
Country
CH
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4B1920.

Country allocation

The ICAO 24-bit address 4B1920 falls within the block assigned to Switzerland (CH) by ICAO Annex 10, Volume III. Every aircraft registered in Switzerland receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 18 distinct

Callsign Airline Flights Last seen
SWR35G Swiss International Air Lines 11 2026-04-18
SWR139 Swiss International Air Lines 10 2026-05-26
SWR138 Swiss International Air Lines 10 2026-05-29
SWR39 Swiss International Air Lines 8 2026-04-19
SWR181 Swiss International Air Lines 8 2026-05-14
SWR180 Swiss International Air Lines 7 2026-05-13
SWR161 Swiss International Air Lines 7 2026-05-29
SWR160 Swiss International Air Lines 7 2026-05-28
SWR93 Swiss International Air Lines 6 2026-05-21
SWR92 Swiss International Air Lines 6 2026-05-20
SWR65 Swiss International Air Lines 6 2026-05-28
SWR64E Swiss International Air Lines 6 2026-05-27
SWR177 Swiss International Air Lines 4 2026-05-19
SWR176 Swiss International Air Lines 4 2026-05-18
SWR9G Swiss International Air Lines 1 2026-05-27
SWR8T Swiss International Air Lines 1 2026-05-26
SWR41G Swiss International Air Lines 1 2026-05-24
SWR40 Swiss International Air Lines 1 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SWR138 ZRH → HKG May 29, 21:10 UTCMay 30, 08:00 UTC10h 50m
2026-05-29 SWR161 NRT → ZRH May 29, 02:50 UTCMay 29, 16:40 UTC13h 50m
2026-05-28 SWR160 ZRH → NRT May 28, 11:45 UTCMay 28, 23:50 UTC12h 5m
2026-05-28 SWR65 MIA → ZRH May 28, 00:00 UTCMay 28, 08:40 UTC8h 40m
2026-05-27 SWR64E ZRH → MIA May 27, 11:35 UTCMay 27, 20:55 UTC9h 20m
2026-05-27 SWR9G ORD → ZRH May 27, 00:34 UTCMay 27, 08:45 UTC8h 11m
2026-05-26 SWR8T ZRH → ORD May 26, 11:44 UTCMay 26, 20:40 UTC8h 55m
2026-05-26 SWR139 HKG → ZRH May 26, 00:09 UTCMay 26, 04:04 UTC3h 55m
2026-05-25 SWR139 HKG → ZRH May 25, 15:50 UTCMay 25, 16:10 UTC20m
2026-05-25 SWR138 ZRH → HKG May 25, 08:00 UTCMay 25, 08:40 UTC40m
2026-05-24 SWR138 ZRH → HKG May 24, 21:05 UTCMay 25, 05:35 UTC8h 30m
2026-05-24 SWR41G LAX → ZRH May 24, 02:50 UTCMay 24, 13:35 UTC10h 45m
2026-05-23 SWR40 ZRH → LAX May 23, 12:10 UTCMay 23, 23:40 UTC11h 30m
2026-05-23 SWR65 MIA → ZRH May 23, 00:05 UTCMay 23, 08:30 UTC8h 24m
2026-05-22 SWR64E ZRH → MIA May 22, 11:40 UTCMay 22, 21:20 UTC9h 40m
2026-05-21 SWR93 GRU → ZRH May 21, 21:45 UTCMay 22, 08:30 UTC10h 45m
2026-05-20 SWR92 ZRH → GRU May 20, 21:00 UTCMay 21, 08:10 UTC11h 10m
2026-05-19 SWR177 SIN → ZRH May 19, 15:55 UTCMay 20, 04:05 UTC12h 10m
2026-05-18 SWR176 ZRH → SIN May 18, 21:05 UTCMay 19, 09:15 UTC12h 10m
2026-05-18 SWR161 NRT → ZRH May 18, 02:25 UTCMay 18, 16:30 UTC14h 5m
2026-05-17 SWR160 ZRH → NRT May 17, 11:25 UTCMay 17, 23:50 UTC12h 25m
2026-05-16 SWR65 MIA → ZRH May 16, 23:55 UTCMay 17, 08:20 UTC8h 25m
2026-05-16 SWR64E ZRH → MIA May 16, 11:31 UTCMay 16, 21:25 UTC9h 54m
2026-05-15 SWR93 GRU → ZRH May 15, 22:20 UTCMay 16, 08:55 UTC10h 36m
2026-05-14 SWR92 GRU → EZE May 14, 21:05 UTCMay 15, 08:15 UTC11h 10m
2026-05-14 SWR181 BKK → ZRH May 14, 06:15 UTCMay 14, 17:45 UTC11h 30m
2026-05-13 SWR180 ZRH → BKK May 13, 16:50 UTCMay 14, 03:00 UTC10h 10m
2026-05-11 SWR177 SIN → ZRH May 11, 16:10 UTCMay 12, 04:30 UTC12h 21m
2026-05-10 SWR176 ZRH → SIN May 10, 21:00 UTCMay 11, 08:20 UTC11h 20m
2026-05-10 SWR161 NRT → ZRH May 10, 02:24 UTCMay 10, 16:10 UTC13h 45m
2026-05-09 SWR160 ZRH → NRT May 9, 11:30 UTCMay 10, 00:00 UTC12h 30m
2026-05-08 SWR177 SIN → ZRH May 8, 16:00 UTCMay 9, 04:15 UTC12h 15m
2026-05-07 SWR176 ZRH → SIN May 7, 21:00 UTCMay 8, 08:19 UTC11h 19m
2026-05-07 SWR161 NRT → ZRH May 7, 02:25 UTCMay 7, 16:30 UTC14h 6m
2026-05-06 SWR160 ZRH → NRT May 6, 11:35 UTCMay 6, 23:45 UTC12h 9m
2026-05-06 SWR65 MIA → ZRH May 6, 00:01 UTCMay 6, 08:15 UTC8h 15m
2026-05-05 SWR64E ZRH → MIA May 5, 11:30 UTCMay 5, 21:10 UTC9h 40m
2026-05-05 SWR65 MIA → ZRH May 5, 00:05 UTCMay 5, 08:35 UTC8h 30m
2026-05-04 SWR64E ZRH → MIA May 4, 11:40 UTCMay 4, 21:35 UTC9h 56m
2026-05-04 SWR139 HKG → ZRH May 4, 00:34 UTCMay 4, 04:29 UTC3h 55m
2026-05-03 SWR139 HKG → ZRH May 3, 16:15 UTCMay 3, 16:30 UTC15m
2026-05-03 SWR138 ZRH → HKG May 3, 07:30 UTCMay 3, 08:10 UTC40m
2026-05-02 SWR138 ZRH → HKG May 2, 20:45 UTCMay 3, 05:25 UTC8h 39m
2026-05-02 SWR161 NRT → ZRH May 2, 02:30 UTCMay 2, 16:25 UTC13h 55m
2026-05-01 SWR160 ZRH → NRT May 1, 11:30 UTCMay 1, 23:50 UTC12h 20m
2026-04-30 SWR139 HKG → ZRH Apr 30, 20:45 UTCMay 1, 04:10 UTC7h 25m
2026-04-30 SWR139 HKG → ZRH Apr 30, 15:30 UTCApr 30, 15:45 UTC15m
2026-04-30 SWR138 ZRH → HKG Apr 30, 07:20 UTCApr 30, 07:50 UTC30m
2026-04-30 SWR138 ZRH → HKG Apr 30, 04:15 UTCApr 30, 05:20 UTC1h 5m
2026-04-29 SWR138 ZRH → HKG Apr 29, 20:50 UTCApr 30, 04:10 UTC7h 19m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the HB-JNK page for operator, model, and routing details .

Mode-S 4B1920 frequently asked

What is Mode-S code 4B1920?
4B1920 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JNK.
Where is Mode-S 4B1920 registered?
Mode-S code 4B1920 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1920 broadcasting right now?
Mode-S 4B1920 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1920, octal 22614440, decimal 4,921,632.
What flights does 4B1920 operate?
Mode-S 4B1920 has broadcast 18 distinct callsigns, including SWR35G, SWR139, SWR138, SWR39, SWR181.